I will never know what was on his mind at the time, nor will

____ is our belief that improvements in health care will lead to a stronger, more prosperous economy.

A：As

B：That

C：This

D：It

—Have you got used to the Chinese food, Robert?—Yes, but I don"t like ____ when a Chinese host keeps serving me the food I don"t like.

A：this

B：that

C：those

D：it

I thought there would be many students in the hall, but when I got in, I found ______.

A：none

B：no one

C：nobody

D：nothing

He didn"t make ______ clear when and where the meeting would be held.

A：this

B：that

C：it

D：these

：—Johnson, there’re a lot of chairs over there. Go and fetch ________ for me.—Why ________ ? Mike is sitting there doing nothing.

A：one; me   

B：that; not he  

C：it; not him  

D：some; I  

Understanding the cultural habits of another nation, especially ____________ containing as many different subcultures as the United States, is very difficult.

A：one

B：that

C：some

D：the one

Some intelligent and successful people find _____ difficult to succeed in language learning.

A：them

B：it

C：themselves

D：itself

To her joy,Della earned first the trust of her students and      of her collegues.

A：that

B：one

C：ones

D：those

It is so difficult a problem that ____ student in this class ____ work it out.

A：any; can"t

B：no; can

C：every; can

D：no; can"t

–Madam, the two ties are the new arrival of this season.–Well , I like ______ of them. Do you have another one?

A：both

B：either

C：neither

D：one